Calculating-machine.



A. PENTECOST.

CALCULATING MACHINE. APPLICATION HLEn MAR. 10.1916.

A. PENTECOST.

CALCULATING MACHINE. AFPLICATION FILED MAR.1o.191.

Patented Oct.. 2;., N18.

2 SHEEYS-SHEET 2.

i-Milet@ Speeiestien 0?.' Letters Patent,

.sppieeen'let March it), MMG. Serial No. $3,236.

.To eli whom t may meif'n:

.he it knewn that li, ARTHUR. Penn Jesi?, suhjeet of the King ci'Enghimi, residing et lsst Grange, county, New Jersey, have invented .newsind useful previ-:ments in Csieuisting-Machines, of W uch the teh'lowing is s specification n ihis invention rehit-es more psrticnhiriyto ineens iter non-printing in ene er :more

iicnoniinstienni pieces, in e eohinin, und Whiie it muy he variously-;ippiied, one i'ieid oi" its useituincss iS forniti in the statementceieuhtting machines, elif the hey0 set, ci'nik-operated type, whicnform hsve @acted es en illustration of one embodi- .iuent of theinvention.

The principei object is to provide nutonizitic ineens eiiective withoutattention en the oieinters part., te rnon-priiu in @ne of@ I moredenenfiinutiens intermediate other ffienoniinutions in whie theprinting` cf cheres# tiss occurs,eitheuw. the invention ,tney hearranged prevent jninting in any denomination i'egzu'diefis of itsiriezi'tien.

in the 'peifticuur ferm shown, the .ini/'enk tion is designed to permitthe printing et numerals, inciudingg ciphers, to iniiiiiztte :my tim ofthe month, und prevent the printing oi"characters in that ienouiiinutionAwherein 'Y my ci the nicuith me the units digits o printed, einenspeci-ii designation keys -in 'the denoiniinitimi ros ymi iI the tensdigits ot the titty og the month, :ire operated.

i :further object is to enehie keys iocufted, the pr itin@ inierent cieui: @ministers in one or more innninzitions of the heyhouiri, suchcentrei iiieing exercised :ni'oniiitieeUy enti Withsut thought on thesert @if the epeifszitor ether the-n to depress the key eerresueneiing'to the iiniiimtionwhich he desires shuii he printed.

To this enti, hevepi'ovifieti iicy 'n oneiic nosniimtien oi" i keyhoeri,the snm/r l* which not oniy sets meehfinisnx. to en en ii'nigsiint efthe indications eoriespemiingg to such keys, hut in addition.,aiutosnaticsiiy eiiiniimtes the pr 'zing' in ene or mere 'difn ferentdeuoniinetions, thus to enihie ep e 'te eontrui et wiii, from the keysci ene dencniinetien, the printing oicinitrecters so--eeiieci time ieu,ieee, ieo'gfieoc;

in e dit'erent denomination or denominav or 3% ere printed in thedenomination,

corresponding with the tens digits of the day of the month, without thesucceeding cipher, in the denomination corresponding with that in whichthe units digits of the dey 0f the .month are printed, which cipherwould be 'useiess enti confusing when printing such specieidesignations.

'ifo these .sind other ends, the invention in dudes certain novelfeatures und combinations of parts, uli of which will be more fully set.forth hereinafter and particularly pointed eut in the claims.

in the eeceinpanying drawings, Figure l u longitudinal sectional Viewthrough the welhknown Wfules calculating machine, equipped with oneembodiment of the invention;

Fig. 2 is en eniergcd detail sectional View of the printing`inechunisni, showing the ineens for non-printing or eliminating theprinting in :t denomination;

Fig. 3 .is u etsii perspective View of such non-printing mechanism,removed frein the machine, and

hig. i is u yedneed pien View of a part of the kcyhoe. roi.

iiitheugh the invention is applicable to other machines, I have shown itin connection with the i/Vuies calculating machine, and for' :i morecomplete disclosure of'the usuel ferm of 1Wales nluchine, reference ishereby imuie to U. S. patents t0 VVnies, #745,539,

ins; sppiicetion oi. Charles V. iViigus, filed Apri! 22, i912, SerialNo. 692,242.

This machine includes a oase 965, Fig.A 1, supporting side iframes 967,between which are located the keyboard erselective mechanisnx, the'accumulating section, and the printer section., l

The keys are arranged in rows or denomi- (Fig) on the iieyhoemieceording to lthe decimal or other vau l una system, there beingenerally, a counter or accumulating whee 490 with its rack orpositioning bar 310, a type carrier 514, and hammer mechanism for eachdenominational row of keys. The type carriers occupy denominationalpositions corresponding with the respective rows of keys which controlthe carriers. The operation of the various denominational trains ofmechanism are alike, and an explanation of one will suffice for all.

Depression of a key 190b (Fig. 1) and key stem 117, rocks a lever 116 toproject an index pin or stop 115 into the path of a correspondingpositioning bar or rack 310. A rack detent 221 normally. lying in thepath of the rack 310 to arrest the latter when no keys in that rowordenomination are depressed, is displaced by the stop 115 of theoperated key.

Front and rear arms 312 and-311 journaled, respectively, on the crossshaft 300 and cross rod 301 mounted in the side frames 967, pivotallysupport the racks or positioning bars 310 at 361 3/4 and 350 for backand forth travel.- Springs 383 connected to the rear supporting arms311, and to a restraining and restoring bail 205 supported in the pathof the front supporting arms 312, by rocking ngers 265, tend to advancethe racks, which advance is normallyv prevented by the bail 205.

Turning the main drive shaft 200 on its forward stroke, rocks a crank210 t0 cause a roll 241 mounted thereon, to traverse a cam fslot 220a ina cam arm 220 pivoted at 260 1/2 to the side frames 967, swinging thecam arm forwardly. The cam arm 1s fixed to the casting carrying thelingers 265 and bail 205, and withdraws the ngers and bail from contactwith the front supporting arms 312. The bail, on its withdrawal, furthertensions the springs 383, which advance the racks or positioning bars310 until the latter are arrested by contact with the projected stop 115or with therack detente 221 in those denominations in which no key isdepressed.

During the advance of the racks, the counters 490"with their inions 435remain out of mesh with the rac rs.

Converging levers 311, projecting rearwardly from the rearrack-supporting arms 311, are connected by links 515 1/8 with the stemsof type carri-ers 514 arranged in a row across the machine and guidedbetween plates 527 1/4 and 527 1/2. As the positioning bars or racks 310advance under the influence of their springs 383, the rear supportingarms 311 and converging levers 311a swing upwardly to lift the typecarriers and bring the types 561 mounted in the type carriers,successively to the printing line on the platen 2094. The arrest of theracks by the projected stops 115 positions the types corresponding to'the keys depressed, at the printing line.

`A universal detainer 518 secured to a shaft 502, normally restrains aseries of printin hammers 510 3/8 journaled on a cross shag 500, againstthe tension of their springs 580, extending between the respectivehammers and a tensioning bail 505 1/2 mounted 'in swinging arms 512 1/4fast on a tensioning Shaft 502 1/4. l

Individual hammer latches 518 1/4 journaled on a. cross bar 504, areengaged by their Springs 581, with lugs 510 3/8* on the hammers 510 3/8to lock, the hammers against operation when released by the universaldetainer 518.

The converging levers 311 in those denominations wherein keys have beendepressed, when swinging upwardly, release trip bars 520 3/4 normallyheld in idle positlon against the tension of their springs 583, by thecontact of the convergin levers with ears 520 3 /4 on the trip bars. ghetrip bars, when released, follow the converging levers upwardly,andstrike the corresponding individual latches 518 1/4 to disengage thelatter from their hammers 510 3/8, prior to the release of the detainer518, which is ef fected by mechanism (not shown), near the end of theforward stroke. Mechanism, also not shown, rocks the tensioning shaft502 1/4 and arms 512 1/4 to tension the hammerdriving springs 580 on theforward stroke of the main drive shaft 200, and upon the re lease of thedetainer 518, the springs 580 drive such of the hammers 510 3/8 as havebeen freed from their individual latches,

518 1/4, against the firing pins or plungers 562 1/4, which in turnstrike the ends of those types 561 ositioned at the printing line, toeffect an imprint on the work sheet carried b the platen.

After t e racks 310 have advanced to their predetermined positions andabout the time when the rintmg takes place, the counters 490 and pinions435 drop into engagement with the, racks, through the action of theusual Tales mechanism, not shown.

The main drive shaft .200 on its forward stroke, has tensioned the mainrestoring spring 285, which, upon the release of the main drive shaft,after it has reached the limit of its forward travel, returns the partsto their normal positions of rest. The crank 210 reversely traverses thecam slot 220a in the cam arm 220 to force the restraining and restorinbail 265, 205 against the advanced forwar supporting arms 312 to retirethe racks 310 to their normal positions. The racks, during suchretirement. turn the counters 490 through pinions 435, to registerthereon, amounts corresponding to the values of the depressed keys.

The retirement. of the racks 310 returns Fig L The shaft 560 en whichthe hemmefs ere journaed, carries Mms 5M which supper; e hamnfieesettinghaii 5509 l/l lying behind :m in content with the hammers. n the fm Werd:stroke of the main. rive shaft, the @haii/g Q0 is turned (by theusuali/Vales leeehe` 1 mism, riot shawn) izo Withdraw weee-ting 'haiiout of *eine path of travel of the hariw mers. On the return stirekea(Jie ehsii', 500 is reversely turned te press the bail egeine: thehammers and. restore them ie7 and. heid them in nermei pesitieix., Thedeminer 518 is etumeii te eieetve position ever the han mers after theiatter .have 'been zceseta emi holds them in such position during ntheWithdrawal of the .reseting bail ein' the nem; forward stroke,

The nfividuel hammer latches 518 1/4- are provied'with the usuelereesever teils o1' release ingers (not Shown), whereby to print;cipher?, te lie righi'. et" my signieen; digit, except in. ehe 'univiedenomination n miniemen?, .meehiies, suee es the one vherein. siieWii,it eustezxiery te provide e, mamiei1-eentre1ied splitr and noi'meimechanism geuemiy comprising a key, Het Shown, the depression of whichepemtee a side M5 meunted in breekets S11/4k, end elet'zed 'teeeeemmodate one er .mme of the miie ei' i'eeese ingee M8 1,/2 pcjeetingfrom 'Mie iiidividuei latches; 5&8 l/Ll. The fingei's 'which enter theSiete iiwthe Slide 3M me pivoted., et e434; l/f, ie iieii hatches?,instead ef being iixedly seemed. thel'ene, as is ueuai when ne splii,in' the neeseeiee provided.,

Sien of 'Ehe key epeiaes he Slide Le A ig the pivoted 51mg m iii/2 frenibeneath vfee adjacent iai/Chee L0 he .ie/ift, ee te prevent 'the 'eieeeeef the denemew ieual lezehee beeing ii'ie ilciiveted iiiigges, when esignieen igit ef' higher deiriemi- 'ed time interups the . ser; m yboerdin the pref-lent embedimem; ei *he inventien een" piuieii'rty ef :rowsef numeie keys l@ (Fign eri'eiweii im demoni?, e'neh 'yew emi mwa 'm mii y netieiiei series ei keys. iii/"hem the spiit is eiiieetivejheweif'eirr ibis mw of keys i90 is used te print die units digie of thedays ef' the menh Te heleifit @if *die i'eW ef keg/"S i995 is metiieriow' @if keys SL90" eempjeieg numeral .ke Ye frei" Le 3 te 'piixi ile15eme digle of 'the deyse the monili, ehe Efe; aiming keys eitheinem'iiig; l desi@ `ne lei"`, Nei, Pf/Qi" elle @he iike, i

Speeia designa'iene me keys. iiizefmeiiete -he 3 'lle ewee; Specialkey', :may bear the Successive numerals fi, and Wg iueiizieed. i? 'willbe mated diet the .keys bearing special @1s-signer tiene eeeupy ehe semepoumons es; the nu." merel iieye WW? 8 end 9" ih@ eti el wwe and.. ximgbe need. te iegisei those digils en the counter 4:90 eeieependiiig withhe dexieminezenei W of keys 190'. The type ezu'iz'iei eeeeping will @hismw eeilfiee 'type eei'ieepeiiding; i0 551e Speeiifi. designation@ Se hetthe ziixblevieione Beij Net and, 3% wii be print-ed infeed @if theigu'ree fjwvs aan Mld 4.49m

The edjeeeniow of .eine eye the iefi; ef iew 190", bezurs.abbiimfinione0i: the moiizhs 'from Jeu 30 Sep, u, shei addi tional yew of threekejy'e i90 beeriiigg; ab

-brevietieus of #bhe femminile@ i'neiichs @1053 e Glee. The iewe ef keysi90@ and i942@ control the exeuisiene ef L f )esiieniiig bei@ 3i@@minnen fue bueh, adj' ,si e ein'gie typeeerrier bearing ;m'i'es}ueiideg 'zi'vely te the printing .line A counter @Ould :a'eadiiy beessecieied with this; peet timing ber, but i is nei, eustemeiy; i.

The foregoing is eid. and eeieemes e met @if 'die pi'efsem; imf'eniononly in. so far es it; iS combined Wih 'fue "novel 'eapuies new ie beseiv :feite isl the iine @if Split is located beween the iewe erdenemimusiens of ke 15)() and 1908 te intemupt eipiiei printing te hefight of 330W 190% is deviens thai: when the Spii;

ens digit of the finte emeuiii..

E; oi'zen, imppens, i'iew-xvem Miei', ifie tei' fieeires ie p'im ene thespeciali miens7 as l ien I'Leyis eilig lewis/d D ie Mie efi ef the ffiiprinting hammer 510 3/8 of the denomination 190 immediately to the leftof the split, out of operation, and thus prevents the im.- print of anycharacter in that denomination.

Depression of any of the numeral keys in the denominational row 190b asthe 6 key shown in dotted lines in Fig. 1, sets its stop 115 to arrestthe advance of the rack 310 and limit the distance through which theconverging lever 311a, link 515 1/8 and typecarrier 511 are lifted.

The length of strokes permitted the rack 310 and itsconected parts byany of the stops 115 coresponding with the numerall keys in denomination190b is not sufficient to operate the special locking means which formsthe subject matter of this invention.

lVhen any of the special designation keys, such as the Bal, Net7 or 3%keys in denomination 190b is depressed, to set its stop in the path ofthe rack 310, the latter is permitted a farther travel than when thenumeral keys of the denomination are operated. The link 515 1/8 whichconnects the converging lever 311a of this denomination with its typecarrier 514, carries, a post or wiper 557 1/8 which, owing to theadditional travel permitted the rack when any of the special designationkeys are depressed, is thereby contacted with ,the inclined or cam edge515 3/8al of a shifter link or driven member 515 3/8. The shifter isslidably supported on a cross rod 506 1/2 passing through a slottherein, and is pivotally secured by a spacing pin or connector 557 3/8to .a non-print hook or latch 518 7/8 journaled on a cross bar 501 1/2.

The upper end of this non-print hook lies in proximity to a detainingstud 557 1/4 projecting from the printing hammer 510 3/8 in the nextadjacent denomination to the right, such printing hammer in thepresentinstance being a part of the denominational train of row 190acoresponding with the units di'its of the days of the month.

A spring 7 80 connected to the shifter and the rid 506 1/2, presses thecam end of the shifter into the path of the wiper 557 1/8. The wipertravels along the cam 515 3/8a of the shifter and forces the latterforwardly against the tension of the spring 780 to rock the non-printhook or lock to effective posi-A tion, over the detaining stud 557 1/4on the printing h immer 510 3/8, so that even when its individual hammerlatch 518 1/4 and the universal detainer 518 are released as heretoforeexplained, the hammer 510 3/8 is still the wiper or drive member 557 1/8moves in its extreme travel, to maintain the nonprint hook in effectiveposition.

As soon as the Wiper 557 1/8 on its return, escapes past the c'am 5153/8", the spring 780 restores thev hook to ineffective position andresets the shifter link 515 3/8 to -idle position.

A stationary guide 515 5/8 extends parallel with' the path of travel ofthe wiper and is spaced apart from the cam end of the shifter asufficient distance to enable the wiper to just pass betwen the shifterand the guide, and maintairs the wiper 557 1/8 in its path, againstdisplacement due to its travel along'the incline or cam 515 3/8, and thepressure of the restoring spring 7 80.

An auxiliary spring 580 1/8 may be connected to the wiper 557 1/8 toassist the usual drive .spring 383 to overcome the friction between thewiper and the shifter 515 3/8.

By locating the cam 515 3/8 atdii'erent points in the path of travel ofthe Wiper, the non-print latch may be controlled or rendered effectiveby a larger or smaller number of keys in the same denomination.

Furthermore, the non-print mechanism herein set forth is not restrictedin its use to a statement machine, but may be applied to any style fkey-set printing machine, to enable certain keys in one denomination tocontrol the imprint of characters in one or more differentdenominations, while characters in the remaining denominations areprinted. K

As one result of this invention, it is possible to non-print in adenomination intermediate other denominations in which printing occurs.

Changes other than those referred to, may;

be made in the form and arrangement of the several parts withoutdeparting from the spirit and scope of this invention.

What I claim is 1. In a machine, the combination with a keyboard,including a plurality of keys arranged in denominational rows or sets;typecarriers for the respective rows of keys, each typecarrier equippedwith types corresponding to the keys 1n its respective row, the keysoperable to control the positions of the types relatively to theprinting line; and a hammer for each typecarrier; of means controlled bycertain of the keys to posione denomination.

2. In a maehiefthe combination 'with keyboard, the numeral keys ofuwhich are arranged 1n denominations; printing noech- `anism, controlledby ther/numeral keys, and

. denomination.

3. In a machine, the combination with a keyboard, the numeral keys ofwhich are arranged'in denominations; printing mechanism, controlled bythe numeral keys, and including type carriers arranged in correspendingdenominations, andl hammers to cooperate with the types oi therespective type carriers; of 'non-'print means controlled by keys in onedenomination to lock the printing hammer 'of at least one otherdenomination against operation,

il. In a machine, the combination with a keyboard, the numeral keys ofwhich are arranged in denominations; printing` mechanism, controlledbythe numeral keys, and including type carriers arranged incorrespending denominations; and hammers to coperate with the types ofthe respective type carriers; of means controlled by keys in onedenomination and automatically eifective upon the operation of themachine, to lock a printing hammer of another denomination in idleposition.

5. In a machine, the combination. 'with a keyboard, including apluraligy ci: keys arranged in denominational rovvs or type carriers-for the respective rows ci? keys, each typecarrier equipped with typescorresponding to the keys in its respective row, the keys operable tocontrol the positions ci the types relatively to the printing; line; anda hammer for each typecarrier; oi nonprint means to positively preventtype impressions in at least one denomination, and means under thecontrol of one of the regular keys in another denomination to shift thenon-print means to effective position.

6. In a machine, the combination with a keyboard, the numeral keys ofwhich are arranged in denominations; printing mechanism, controlled bythe numeral keys, and includingl type carriers arranged in correspondingdenominations; and hammers to coperate with the types ot the respectivetype carriers; of means eifeetive only when certain keys of onedenomination are operated, to prevent the imprint oi characters inanother denomination, the characters corresponding to the operated keysof the iirstnamed denomination being printed.

'7. In a machine, the combination with a keyboard havingr denominationalrows of keys; type carriers and types for the correspondingdenominations; printing hammers for typ-e carriers; and drive mechi'iorthe respective type carriers, the excursions oi which drive mechanismsare controlled yby the keys in the respective olenoininations, of meansoperable by one of the drive mechanisms at a predetermined point in itspath, to prevent printing in another denomination 8, ln a machine, thecombination with a keyboard having denominational rows oit' keys; typecarriers and types for the correspendingr denominations; printing;hammers for the type ca criers; and drive mechanisms for theprespectivetype carriers, the excursions oi which. drive mechanisms are controlledhy the keys in the respective denominations; of a lock operable by oneof the drive mechanisms dering a part oi its travel, to prevent theoperation of a printing hammer coastingn with the types in a typ-ecarrier et another denomination.

9. lin machine, the combination with keys arranged in denominationalrows; type carriers for the respective denominations, and heating4 typescorrespondinoJ with the several keys of such dei'iominations; printinghammers to coast with the types in the respective type carriers; anddrive mechanisms for 'the respective type carriers, the excursions ofwhich are controlled by the keys of corresponding denominations; ofnon-print means controlled by certain only et the keys oi onedenomination to prevent the imprint oi* characters in motherdenominatioim 'lh .lin a machine, the combination with ers for therespective denominations, and hearing types corresponding with theseveral keys oi3 such denominations; printing hammers te coact with thetypes in the respective type carriers; and drive mechanisms for therespective type carriers, the excursions of which are controlled hy thekeys oi' corresponding denominations; ci means to eliminate printing ina denomination intermediate other denominations in which printingoccurs, even though a key be depressed in such denomination whereinprinting is eliminated.

li. ln a machine, the combination With keys arranged in denominationalrows; type carriers 'for the respective denominations, and hearingJtypes corresponding with the several keys of such denominations;printing hammers to coact with the types in the respective typecarriers; and drive mechanisms for the respective type carriers, theexcursions ot which are controlled by the keys of correspondingdenominations; oi means controlled by keys in one denomination toeliminate printing in another denomination intermcdiate remaining denominations in which printing occurs.

i2, machine, the combination with ranged in denominational rows; type ylli) keys arranged in denominational rows; .type carriers for Vtherespective denominations, and bearing types corresponding with theseveral keys of such denominations.; printing hammers to coact with the*types in the respective type carriers; and drive mechanisms for therespective type carriers, the excursions of which are controlled by thekeys of corresponding denominations; of a wiper mounted on thezfdrivemechanism of one denomination; a shifter having a cam extending into thepath of the wiper; a normally idle latch to which the shifter I sconnected; and a stud on one of the printing hammers, to be engaged bythe latch to lock the hammer against operation.

13. In a machine, the combination with keys arranged in denominationalrows; 'type carriers for the respective denominations, and bearing typescorresponding .with the several keys of such denominations; printinghammers to co-actwith the types in the respective type carriers; anddrive mechanisms for the respective type carriers, the excursions ofwhich are controlled by the keys of corresponding denominations; of awiper mounted on the drive mechanlsm of one denomination; a shifterhaving a cam extending into the path ofthe wiper; a normally idle latchtowhich the shifter is connected; a stud on one of the printing hammersto be engaged by the latch to lock the hammer against operation; and aguide along which the wiper travels, to hold the wiper in its pathagainst displacement.

14. In a machine, the combination with keys arranged in denominationalrows; type carriers for the respective denominations and bearing typescorresponding with the several keys of such denominations; printinghammers to coact with the types in the respective type carriers; anddrive mechanisms for the respective type carriers, the excursionsofwhich are controlled by the keys of corresponding denominations; of awiper mounted on the drive mechanism of one denomination; a shifterhaving a cam extending into the path ofthe wiper; a normally idle latchto which the shifter is connected; a stud on one of the printinghammers, topbe engaged by the latch to lock the hammer againstoperation; and a spring to restore the shifter and latch to normal.

15. In a machine, the combination With keys arranged in denominationalrows; type carriers for the respective denominations, and bearing typescorresponding with the several keys of such denominations; printinghammers to coact with the types in the respective type carriers; anddrive mechanisms for the respective type carriers, the eX- cursions ofwhich are controlled by the keys of corresponding de1iominatio`ns;`of awiper mounted on the drive mechanism of one denomination; a shifterhaying .ja caml extending into the path of the wiper; a normally idlelatch to which the shifter is connected; a stud on one of the printinghammers, to be engaged by the latch to lock the hammer againstoperation; and a spring to overcome the resistance of the shifter to thetravel of the drive mechanism.

16. In a machine, the combination with a series of denominational trainsof mechanism, each train including keys, a positioning bar, a typecarrier and a hammer to c0- act with the types in the type' carrier; ofmeans operable .by one of the denominational trains of mechanism toprevent the printing of characters in another denomination.

17. In a machine, the combination with a keyboard having keys, andprinting mechanism controlled by the numeral keys and including typecarriers arranged in denominations; of means to eliminate printing in adenomination intermediate other denominations in which printing occurseven though a key be depressed in such denomination wherein printing iseliminated.

18. In a machine, the combination with ar keyboard having keys, andprinting mechanism controlled by the numeral keys and including typecarriers arranged in denominations; of key-controlled means to eliminateprinting in any denomination intermediate other denominations in whichprinting occurs even though a key be depressed in such denominationwherein printing is eliminated. V

.19. The combination with a keyboard, including a plurality of keysarranged in denominational rows or banks; typecarriers forthe-respective rows of keys, equipped with types corresponding to thekeys in its respective row, the keys operable to control the positionsof the types relatively to the printing line; and a hammer for eachtypecarrier; of automatic means to positively prevent printing in onedenomination, said automatic means controlled by one of the regulardenominational keys as an incident to its control of its correlatedtypecarrier.

20. In a machine, the combination with a keyboard, the numeral keys ofwhich are arranged in denominations; printing mechanism controlled bythe numeral keys, and including typecarriers arranged. in correspondingdenominations; and hammers to coperate with the types of the respectivetypeearriers; of means controlled by keys in one denomination, andbecoming eifective automatically upon the operation of the machine, toprevent printing in another denomination.`

21. In a machine, the combination With a keyboard, the numeral keys ofwhich are arranged in denominations; printing mechanism controlled bythe numeral keys, and including typecarriers arrangedciil corre-

